I coudln\'t find out how to use the \"lang: de\" option (link) properly. That is, while tables are correctly named \"Tabelle\", the following settings:
--- t
Following Tobi we can define language and use latex package csquotes.
csquotes
--- title: "German quotation marks" author: "will" date: "24 Jänner 2018" output: pdf_document lang: de header-includes: - \usepackage{csquotes} --- "Das ist sehr schön", sagte sie.